The patch titled
knfsd: various nfsd xdr cleanups
has been added to the -mm tree. Its filename is
knfsd-various-nfsd-xdr-cleanups.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: knfsd: various nfsd xdr cleanups
From: NeilBrown <neilb@xxxxxxx>
1/ decode_sattr and decode_sattr3 never return NULL, so remove
several checks for that. ditto for xdr_decode_hyper.
2/ replace some open coded XDR_QUADLEN calls with calls to
XDR_QUADLEN
3/ in decode_writeargs, simply an 'if' to use a single
calculation.
.page_len is the length of that part of the packet that did
not fit in the first page (the head).
So the length of the data part is the remainder of the
head, plus page_len.
3/ other minor cleanups.
Signed-off-by: Neil Brown <neilb@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/nfsd/nfs3xdr.c | 55 ++++++++++++++++----------------------------
fs/nfsd/nfsxdr.c | 39 +++++++++++--------------------
2 files changed, 34 insertions(+), 60 deletions(-)
diff -puN fs/nfsd/nfs3xdr.c~knfsd-various-nfsd-xdr-cleanups fs/nfsd/nfs3xdr.c
--- a/fs/nfsd/nfs3xdr.c~knfsd-various-nfsd-xdr-cleanups
+++ a/fs/nfsd/nfs3xdr.c
@@ -239,7 +239,7 @@ static __be32 *
encode_post_op_attr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp)
{
struct dentry *dentry = fhp->fh_dentry;
- if (dentry && dentry->d_inode != NULL) {
+ if (dentry && dentry->d_inode) {
int err;
struct kstat stat;
@@ -300,9 +300,9 @@ int
nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p,
struct nfsd3_sattrargs *args)
{
- if (!(p = decode_fh(p, &args->fh))
- || !(p = decode_sattr3(p, &args->attrs)))
+ if (!(p = decode_fh(p, &args->fh)))
return 0;
+ p = decode_sattr3(p, &args->attrs);
if ((args->check_guard = ntohl(*p++)) != 0) {
struct timespec time;
@@ -343,9 +343,9 @@ nfs3svc_decode_readargs(struct svc_rqst
int v,pn;
u32 max_blocksize = svc_max_payload(rqstp);
- if (!(p = decode_fh(p, &args->fh))
- || !(p = xdr_decode_hyper(p, &args->offset)))
+ if (!(p = decode_fh(p, &args->fh)))
return 0;
+ p = xdr_decode_hyper(p, &args->offset);
len = args->count = ntohl(*p++);
@@ -372,9 +372,9 @@ nfs3svc_decode_writeargs(struct svc_rqst
unsigned int len, v, hdr, dlen;
u32 max_blocksize = svc_max_payload(rqstp);
- if (!(p = decode_fh(p, &args->fh))
- || !(p = xdr_decode_hyper(p, &args->offset)))
+ if (!(p = decode_fh(p, &args->fh)))
return 0;
+ p = xdr_decode_hyper(p, &args->offset);
args->count = ntohl(*p++);
args->stable = ntohl(*p++);
@@ -388,29 +388,16 @@ nfs3svc_decode_writeargs(struct svc_rqst
/*
* Check to make sure that we got the right number of
* bytes.
- *
- * If more than one page was used, then compute the length
- * of the data in the request as the total size of the
- * request minus the transport protocol headers minus the
- * RPC protocol headers minus the NFS protocol fields
- * already consumed. If the request fits into a single
- * page, then compete the length of the data as the size
- * of the NFS portion of the request minus the NFS
- * protocol fields already consumed.
*/
hdr = (void*)p - rqstp->rq_arg.head[0].iov_base;
- if (rqstp->rq_respages != rqstp->rq_pages + 1) {
- dlen = rqstp->rq_arg.len -
- (PAGE_SIZE - rqstp->rq_arg.head[0].iov_len) - hdr;
- } else {
- dlen = rqstp->rq_arg.head[0].iov_len - hdr;
- }
+ dlen = rqstp->rq_arg.head[0].iov_len + rqstp->rq_arg.page_len
+ - hdr;
/*
* Round the length of the data which was specified up to
* the next multiple of XDR units and then compare that
* against the length which was actually received.
*/
- if (dlen != ((len + 3) & ~0x3))
+ if (dlen != XDR_QUADLEN(len)*4)
return 0;
if (args->count > max_blocksize) {
@@ -442,8 +429,7 @@ nfs3svc_decode_createargs(struct svc_rqs
switch (args->createmode = ntohl(*p++)) {
case NFS3_CREATE_UNCHECKED:
case NFS3_CREATE_GUARDED:
- if (!(p = decode_sattr3(p, &args->attrs)))
- return 0;
+ p = decode_sattr3(p, &args->attrs);
break;
case NFS3_CREATE_EXCLUSIVE:
args->verf = p;
@@ -459,10 +445,10 @@ int
nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p,
struct nfsd3_createargs *args)
{
- if (!(p = decode_fh(p, &args->fh))
- || !(p = decode_filename(p, &args->name, &args->len))
- || !(p = decode_sattr3(p, &args->attrs)))
+ if (!(p = decode_fh(p, &args->fh)) ||
+ !(p = decode_filename(p, &args->name, &args->len)))
return 0;
+ p = decode_sattr3(p, &args->attrs);
return xdr_argsize_check(rqstp, p);
}
@@ -476,11 +462,12 @@ nfs3svc_decode_symlinkargs(struct svc_rq
char *old, *new;
struct kvec *vec;
- if (!(p = decode_fh(p, &args->ffh))
- || !(p = decode_filename(p, &args->fname, &args->flen))
- || !(p = decode_sattr3(p, &args->attrs))
+ if (!(p = decode_fh(p, &args->ffh)) ||
+ !(p = decode_filename(p, &args->fname, &args->flen))
)
return 0;
+ p = decode_sattr3(p, &args->attrs);
+
/* now decode the pathname, which might be larger than the first page.
* As we have to check for nul's anyway, we copy it into a new page
* This page appears in the rq_res.pages list, but as pages_len is always
@@ -530,10 +517,8 @@ nfs3svc_decode_mknodargs(struct svc_rqst
args->ftype = ntohl(*p++);
if (args->ftype == NF3BLK || args->ftype == NF3CHR
- || args->ftype == NF3SOCK || args->ftype == NF3FIFO) {
- if (!(p = decode_sattr3(p, &args->attrs)))
- return 0;
- }
+ || args->ftype == NF3SOCK || args->ftype == NF3FIFO)
+ p = decode_sattr3(p, &args->attrs);
if (args->ftype == NF3BLK || args->ftype == NF3CHR) {
args->major = ntohl(*p++);
diff -puN fs/nfsd/nfsxdr.c~knfsd-various-nfsd-xdr-cleanups fs/nfsd/nfsxdr.c
--- a/fs/nfsd/nfsxdr.c~knfsd-various-nfsd-xdr-cleanups
+++ a/fs/nfsd/nfsxdr.c
@@ -231,9 +231,10 @@ int
nfssvc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p,
struct nfsd_sattrargs *args)
{
- if (!(p = decode_fh(p, &args->fh))
- || !(p = decode_sattr(p, &args->attrs)))
+ p = decode_fh(p, &args->fh);
+ if (!p)
return 0;
+ p = decode_sattr(p, &args->attrs);
return xdr_argsize_check(rqstp, p);
}
@@ -303,29 +304,17 @@ nfssvc_decode_writeargs(struct svc_rqst
/*
* Check to make sure that we got the right number of
* bytes.
- *
- * If more than one page was used, then compute the length
- * of the data in the request as the total size of the
- * request minus the transport protocol headers minus the
- * RPC protocol headers minus the NFS protocol fields
- * already consumed. If the request fits into a single
- * page, then compete the length of the data as the size
- * of the NFS portion of the request minus the NFS
- * protocol fields already consumed.
*/
hdr = (void*)p - rqstp->rq_arg.head[0].iov_base;
- if (rqstp->rq_respages != rqstp->rq_pages + 1) {
- dlen = rqstp->rq_arg.len -
- (PAGE_SIZE - rqstp->rq_arg.head[0].iov_len) - hdr;
- } else {
- dlen = rqstp->rq_arg.head[0].iov_len - hdr;
- }
+ dlen = rqstp->rq_arg.head[0].iov_len + rqstp->rq_arg.page_len
+ - hdr;
+
/*
* Round the length of the data which was specified up to
* the next multiple of XDR units and then compare that
* against the length which was actually received.
*/
- if (dlen != ((len + 3) & ~0x3))
+ if (dlen != XDR_QUADLEN(len)*4)
return 0;
rqstp->rq_vec[0].iov_base = (void*)p;
@@ -346,10 +335,10 @@ int
nfssvc_decode_createargs(struct svc_rqst *rqstp, __be32 *p,
struct nfsd_createargs *args)
{
- if (!(p = decode_fh(p, &args->fh))
- || !(p = decode_filename(p, &args->name, &args->len))
- || !(p = decode_sattr(p, &args->attrs)))
+ if ( !(p = decode_fh(p, &args->fh))
+ || !(p = decode_filename(p, &args->name, &args->len)))
return 0;
+ p = decode_sattr(p, &args->attrs);
return xdr_argsize_check(rqstp, p);
}
@@ -393,11 +382,11 @@ int
nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p,
struct nfsd_symlinkargs *args)
{
- if (!(p = decode_fh(p, &args->ffh))
- || !(p = decode_filename(p, &args->fname, &args->flen))
- || !(p = decode_pathname(p, &args->tname, &args->tlen))
- || !(p = decode_sattr(p, &args->attrs)))
+ if ( !(p = decode_fh(p, &args->ffh))
+ || !(p = decode_filename(p, &args->fname, &args->flen))
+ || !(p = decode_pathname(p, &args->tname, &args->tlen)))
return 0;
+ p = decode_sattr(p, &args->attrs);
return xdr_argsize_check(rqstp, p);
}
_
Patches currently in -mm which might be from neilb@xxxxxxx are
origin.patch
fix-quadratic-behavior-of-shrink_dcache_parent.patch
freezer-add-try_to_freeze-calls-to-all-kernel-threads.patch
nlmclnt_recovery-dont-use-clone_sighand.patch
introduce-freezer-flags-rev-2.patch
the-nfsv2-nfsv3-server-does-not-handle-zero-length-write.patch
knfsd-rename-sk_defer_lock-to-sk_lock.patch
nfsd-nfs4state-remove-unnecessary-daemonize-call.patch
rpc-add-wrapper-for-svc_reserve-to-account-for-checksum.patch
rpc-add-wrapper-for-svc_reserve-to-account-for-checksum-fix.patch
sunrpc-fix-error-path-in-module_init.patch
knfsd-avoid-use-of-unitialised-variables-on-error-path-when-nfs-exports.patch
knfsd-rpc-fix-server-side-wrapping-of-krb5i-replies.patch
knfsd-fix-resource-leak-resulting-in-module-refcount-leak-for-rpcsec_gss_krb5ko.patch
knfsd-rpcgss-rpc_gss_proc_-destroy-request-will-get-a-bad-rpc.patch
knfsd-simplify-a-while-condition-in-svcsockc.patch
knfsd-trivial-makefile-cleanup.patch
knfsd-various-nfsd-xdr-cleanups.patch
knfsd-avoid-oops-if-buggy-userspace-performs-confusing-filehandle-dentry-mapping.patch
readahead-nfsd-case.patch
drivers-mdc-use-array_size-macro-when-appropriate.patch
md-cleanup-use-seq_release_private-where-appropriate.patch
md-dm-reduce-stack-usage-with-stacked-block-devices.patch
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